head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
An open-world arcade racer across Australia where car control and tuning carry every event.

Execution · Practiced Mastery
Motorsport-focused racer spanning touring cars, endurance, open wheel, and street circuits.
Forza Horizon 3 leans Execution (Practiced Mastery); GRID Autosport leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Car control and racing lines at speed
GRID Autosport
Discipline-spanning car control demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Drivatars mimic but don't truly adapt
GRID Autosport
Racecraft against AI and online drivers
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Minor traffic and event variation
GRID Autosport
Race incidents and AI behaviour vary
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Forza Horizon 3
Tuning, car choice, and route knowledge
GRID Autosport
Tuning, lines, and discipline-specific technique
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.